A non-bloated contact form - shortcode [my_contact_form]. Easier setup than Contact Form 7 and other popular contact forms. Simply use the shortcode on a page and publish.
Automatically login new user right after they have registered. Add Password field to registration form. Disable admin notification emails of new user registrations and user password resets. Allow redirect of new user to any page right after they have registered. Add Firstname and Lastname field to registration form.